Human Digestive System Worksheet | Download Free PDF | Human ... - Free Printable

Let's solve each part of this worksheet step by step.

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(1) Match the words provided to the letters in the diagram of the digestive system.

We are given a diagram with labeled parts (A–J), and we need to match them with the correct organ names:

Given terms:
- Liver
- Stomach
- Salivary glands
- Pancreas
- Rectum
- Mouth
- Oesophagus
- Gall Bladder
- Small intestines
- Large intestines

Now, let’s identify each letter based on the typical human digestive system anatomy:

#### Diagram Analysis:
- A: Located near the mouth, likely Salivary glands (since they are near the mouth).
- B: The large sac-like organ just below the esophagus → Stomach
- C: The organ above the stomach, often shown as a large organ under the ribs → Liver
- D: The coiled tube structure → Small intestines
- E: The wider, more distal end of the intestines → Large intestines
- F: The opening at the top → Mouth
- G: The tube connecting mouth to stomach → Oesophagus
- H: The small pouch attached to the liver → Gall Bladder
- I: The organ behind the stomach → Pancreas
- J: The lower end of the large intestine → Rectum

#### Now fill in the table:

| Letter | Part of Digestive System |
|--------|--------------------------|
| A | Salivary glands |
| B | Stomach |
| C | Liver |
| D | Small intestines |
| E | Large intestines |
| F | Mouth |
| G | Oesophagus |
| H | Gall Bladder |
| I | Pancreas |
| J | Rectum |

✔ Answer Key for (1):

| Letter | Part of Digestive System |
|--------|--------------------------|
| A | Salivary glands |
| B | Stomach |
| C | Liver |
| D | Small intestines |
| E | Large intestines |
| F | Mouth |
| G | Oesophagus |
| H | Gall Bladder |
| I | Pancreas |
| J | Rectum |

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(2) Which of the following gives the correct order for food as it passes through the organs of the digestive system?

Let’s analyze the options:

a. Mouth, oesophagus, stomach, gall bladder, pancreas, large intestines, small intestines
→ Incorrect: Gall bladder and pancreas are accessory organs; food doesn’t pass *through* them. Also, small intestines come before large intestines.

b. Oesophagus, epiglottis, stomach, liver, small intestines, large intestines, anus
→ Incorrect: Epiglottis is not a passage; it's a flap that prevents choking. Also, liver isn't in the path of food.

c. Mouth, oesophagus, stomach, small intestines, large intestines, anus
→ ✔ Correct! This is the correct sequence of food passage.

d. Mouth, liver, gall bladder, stomach, large intestines, small intestines, anus
→ Incorrect: Food does not go through liver or gall bladder. Also, small intestines come before large intestines.

✔ Correct answer: c. Mouth, oesophagus, stomach, small intestines, large intestines, anus

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(3) Which part of the digestive system is responsible for absorbing water?

Let’s evaluate:

a. Small intestines → Main site of nutrient absorption, but also absorbs some water
b. Large intestines → ✔ Primary site for water absorption from undigested food
c. Kidneys → Part of urinary system, not digestive
d. Stomach → Absorbs some alcohol and drugs, but not major water absorption

✔ Correct answer: b. Large intestines

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(4) Which part of the digestive system contains Hydrochloric acid and is coated with mucus for its protection?

Hydrochloric acid (HCl) is secreted in the stomach by parietal cells. The stomach lining is protected by mucus to prevent self-digestion.

a. Rectum → No HCl; stores feces
b. Small intestines → Enzymes, but no HCl
c. Stomach → ✔ Contains HCl and has mucus lining
d. Oesophagus → No HCl; can be damaged by reflux

✔ Correct answer: c. Stomach

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✔ Final Answers Summary:

(1) Matching Table:
| Letter | Part of Digestive System |
|--------|--------------------------|
| A | Salivary glands |
| B | Stomach |
| C | Liver |
| D | Small intestines |
| E | Large intestines |
| F | Mouth |
| G | Oesophagus |
| H | Gall Bladder |
| I | Pancreas |
| J | Rectum |

(2) Correct order: c. Mouth, oesophagus, stomach, small intestines, large intestines, anus

(3) Water absorption: b. Large intestines

(4) HCl and mucus: c. Stomach

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